org.simpleframework.http.parse
Class CookieParser

java.lang.Object
  org.simpleframework.common.parse.Parser
      org.simpleframework.http.parse.CookieParser

All Implemented Interfaces:

Iterable<Cookie>

public class CookieParser
extends Parser
implements Iterable<Cookie>

CookieParser is used to parse the cookie header. The cookie header is one of the headers that is used by the HTTP state management mechanism. The Cookie header is the header that is sent from the client to the server in response to a Set-Cookie header. The syntax of the Cookie header as taken from RFC 2109, HTTP State Management Mechanism.

  cookie          =       "Cookie:" cookie-version
                          1*((";" | ",") cookie-value)
  cookie-value    =       NAME "=" VALUE [";" path] [";" domain]
  cookie-version  =       "$Version" "=" value
  NAME            =       attr
  VALUE           =       value
  path            =       "$Path" "=" value
  domain          =       "$Domain" "=" value

 

The cookie header may consist of several cookies. Each cookie can be extracted from the header by examining the it syntax of the cookie header. The syntax of the cookie header is defined in RFC 2109.

Each cookie has a $Version attribute followed by multiple cookies. Each contains a name and a value, followed by an optional $Path and $Domain attribute. This will parse a given cookie header and return each cookie extracted as a Cookie object.

Author:

Niall Gallagher

Field Summary

Fields inherited from class org.simpleframework.common.parse.Parser

buf, count, off

Constructor Summary

CookieParser()
Create a CookieParser that contains no cookies.

CookieParser(String header)
This is primarily a convineance constructor.

Method Summary

protected void	init() Resets the cookie and the buffer variables for this CookieParser.
Iterator<Cookie>	iterator() This is used to acquire the cookie values from the provided the provided source text.
protected void	parse() This will extract the next Cookie from the buffer.
void	reset() This is used so that the collection of Cookies can be reiterated.
protected boolean	skip(String text) This is used to skip an arbitrary String within the char buf.

Methods inherited from class org.simpleframework.common.parse.Parser

digit, ensureCapacity, parse, space, toLower

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CookieParser

public CookieParser()

Create a CookieParser that contains no cookies. the instance will return false for the hasNext method. cookies may be parsed using this instance by using the parse method.

CookieParser

public CookieParser(String header)

This is primarily a convineance constructor. This will parse the String given to extract the cookies. This could be achived by calling the default no-arg constructor and then using the instance to invoke the parse method on that String.

Parameters:

header - a String containing a cookie value

Method Detail

init

protected void init()

Resets the cookie and the buffer variables for this CookieParser. It is used to set the state of the parser to start parsing a new cookie.

Specified by:

init in class Parser

parse

protected void parse()

This will extract the next Cookie from the buffer. If all the characters in the buffer have already been examined then this method will simply do nothing. Otherwise this will parse the remainder of the buffer and (if it follows RFC 2109) produce a Cookie.

Specified by:

parse in class Parser

skip

protected boolean skip(String text)

This is used to skip an arbitrary String within the char buf. It checks the length of the String first to ensure that it will not go out of bounds. A comparison is then made with the buffers contents and the String if the reigon in the buffer matched the String then the offset within the buffer is increased by the String's length so that it has effectively skipped it.

This skip method will ignore all of the whitespace text. This will also skip trailing spaces within the the input text and all spaces within the source text. For example if the input was the string "s omete xt" and the source was "some text to skip" then the result of a skip ignoring spaces would be "to skip" in the source string, as the trailing spaces are also eaten by this.

Overrides:

skip in class Parser

Parameters:

text - this is the String value to be skipped

Returns:

true if the String was skipped

iterator

public Iterator<Cookie> iterator()

This is used to acquire the cookie values from the provided the provided source text. This allows the cookie parser to be used within a for each loop to parse out the values of a cookie one by one so that they may be used or stored.

Specified by:

iterator in interface Iterable<Cookie>

Returns:

this returns an iterator for extracting cookie value

reset

public void reset()

This is used so that the collection of Cookies can be reiterated. This allows the collection to be reused. The reset method will invoke the super classes init method. This will reinitialize this Parser so the cookie will be reparsed.